1. Editorial

   Editorial 22 October 2020 Pages: 189 - 190

2. The Problem of Reflection in Eighteenth-Century Projectile Theories of Light

   • Breno Arsioli Moura

   OriginalPaper 01 December 2020 Pages: 191 - 214

   

3. Redshifts versus Paradigm Shifts: Against Renaming Hubble’s Law

   • Cormac O’Raifeartaigh
   • Michael O’Keeffe

   OriginalPaper 28 September 2020 Pages: 215 - 225

   

4. Professors of Natural Philosophy in the Nineteenth Century

   • Thomas B. Greenslade Jr.

   OriginalPaper 09 December 2020 Pages: 226 - 238

5. Book Review

   • Joshua Nall

   Book Review 28 September 2020 Pages: 239 - 242

6. Book Review

   • Jonathan Lyonhart

   Book Review 11 November 2020 Pages: 243 - 245